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With the help of two examples name the map and reduce function purpose


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More MapReduce Interview Questions

What is the Job interface in MapReduce framework?

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How many Mappers run for a MapReduce job?

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What is optimal size of a file for distributed cache?

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What is a "map" in Hadoop?

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What is KeyValueTextInputFormat in Hadoop MapReduce?

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What does conf.setmapper class do?

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What are the identity mapper and reducer in MapReduce?

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What is MapReduce?

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Explain how do ‘map’ and ‘reduce’ work?

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How to overwrite an existing output file during execution of mapreduce jobs?

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How is Spark not quite the same as MapReduce? Is Spark quicker than MapReduce?

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